解方程：81x-341=76(x-2),14x-12=7x+23,9(x-4)=45+6x,2(x-2)+3(4x-2)

来源：学生作业帮编辑：神马作文网作业帮分类：数学作业时间：2024/11/19 23:58:22

解方程：81x-341=76(x-2),14x-12=7x+23,9(x-4)=45+6x,2(x-2)+3(4x-2)=7(x=4),下面还有
6-0.6(x-0.6）=0.6,(3x+2)÷4=2x-7,30÷x+25=85,（200-x）÷5=30
急,大家帮帮忙~~~~

分别解方程：
81X-341=76(X-2),
81x-76x=341-2*76,
5x=189
x=37.8
14x-12=7x+23,
14x-7x=23+12
7x=35,x=5
9(x-4)=45+6x,
9x-6x=45+4*9
3x=81,x=27
2(x-2)+3(4x-2)=7(x-4),
2x+12x-7x=2*2+3*2-4*7
7x=-18,x=-18/7
6-0.6(x-0.6)=0.6,
0.6x=6-0.6+0.36
0.6x=5.04,x=8.4
(3x+2)/4=2x-7,
3x+2=8x-28,
8x-3x=28+2
5x=30,x=6
30/x+25=85,
30+25x=85x,
85x-25x=30
60x=30,x=1/2
(200-x)/5=30,
200-x=150
x=200-150,x=50

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